/*
   * (C) Copyright 2012,2015 Stephen Warren
   *
   * SPDX-License-Identifier:	GPL-2.0
   */
  
  #ifndef _RPI_COMMON_H_
  #define _RPI_COMMON_H_
  
  #include <linux/sizes.h>
  
  /* Architecture, CPU, etc.*/
  #define CONFIG_SYS_GENERIC_BOARD
  #define CONFIG_BCM2835
  #define CONFIG_ARCH_CPU_INIT
  #define CONFIG_SYS_DCACHE_OFF
  /*
   * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
   * so 2708 has historically been used rather than a dedicated 2835 ID.
   *
   * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
   * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
   * rather than obtaining a valid ID:-/
   */
  #ifndef CONFIG_BCM2836
  #define CONFIG_MACH_TYPE		MACH_TYPE_BCM2708
  #endif
  
  /* Memory layout */
  #define CONFIG_NR_DRAM_BANKS		1
  #define CONFIG_SYS_SDRAM_BASE		0x00000000
  #define CONFIG_SYS_TEXT_BASE		0x00008000
  #define CONFIG_SYS_UBOOT_BASE		CONFIG_SYS_TEXT_BASE
  /*
   * The board really has 256M. However, the VC (VideoCore co-processor) shares
   * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
   * smaller amount of RAM is present in order to avoid stomping on the area
   * the VC uses.
   */
  #define CONFIG_SYS_SDRAM_SIZE		SZ_128M
  #define CONFIG_SYS_INIT_SP_ADDR		(CONFIG_SYS_SDRAM_BASE + \
  					 CONFIG_SYS_SDRAM_SIZE - \
  					 GENERATED_GBL_DATA_SIZE)
  #define CONFIG_SYS_MALLOC_LEN		SZ_4M
  #define CONFIG_SYS_MEMTEST_START	0x00100000
  #define CONFIG_SYS_MEMTEST_END		0x00200000
  #define CONFIG_LOADADDR			0x00200000
  
  /* Flash */
  #define CONFIG_SYS_NO_FLASH
  
  /* Devices */
  /* GPIO */
  #define CONFIG_BCM2835_GPIO
  /* LCD */
  #define CONFIG_LCD
  #define CONFIG_LCD_DT_SIMPLEFB
  #define LCD_BPP				LCD_COLOR16
  /*
   * Prevent allocation of RAM for FB; the real FB address is queried
   * dynamically from the VideoCore co-processor, and comes from RAM
   * not owned by the ARM CPU.
   */
  #define CONFIG_FB_ADDR			0
  #define CONFIG_VIDEO_BCM2835
  #define CONFIG_SYS_WHITE_ON_BLACK
  
  /* SD/MMC configuration */
  #define CONFIG_GENERIC_MMC
  #define CONFIG_MMC
  #define CONFIG_SDHCI
  #define CONFIG_MMC_SDHCI_IO_ACCESSORS
  #define CONFIG_BCM2835_SDHCI
  
  #define CONFIG_CMD_USB
  #ifdef CONFIG_CMD_USB
  #define CONFIG_USB_DWC2
  #ifdef CONFIG_BCM2836
  #define CONFIG_USB_DWC2_REG_ADDR 0x3f980000
  #else
  #define CONFIG_USB_DWC2_REG_ADDR 0x20980000
  #endif
  #define CONFIG_USB_STORAGE
  #define CONFIG_USB_HOST_ETHER
  #define CONFIG_USB_ETHER_SMSC95XX
  #define CONFIG_MISC_INIT_R
  #endif
  
  /* Console UART */
  #define CONFIG_PL01X_SERIAL
  #define CONFIG_CONS_INDEX		0
  #define CONFIG_BAUDRATE			115200
  
  /* Console configuration */
  #define CONFIG_SYS_CBSIZE		1024
  #define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE +		\
  					 sizeof(CONFIG_SYS_PROMPT) + 16)
  
  /* Environment */
  #define CONFIG_ENV_SIZE			SZ_16K
  #define CONFIG_ENV_IS_IN_FAT
  #define FAT_ENV_INTERFACE		"mmc"
  #define FAT_ENV_DEVICE_AND_PART		"0:1"
  #define FAT_ENV_FILE			"uboot.env"
  #define CONFIG_FAT_WRITE
  #define CONFIG_ENV_VARS_UBOOT_CONFIG
  #define CONFIG_SYS_LOAD_ADDR		0x1000000
  #define CONFIG_CONSOLE_MUX
  #define CONFIG_SYS_CONSOLE_IS_IN_ENV
  
  /* Shell */
  #define CONFIG_SYS_MAXARGS		8
  #define CONFIG_SYS_PROMPT		"U-Boot> "
  #define CONFIG_COMMAND_HISTORY
  
  /* Commands */
  #include <config_cmd_default.h>
  #define CONFIG_CMD_GPIO
  #define CONFIG_CMD_MMC
  #define CONFIG_PARTITION_UUIDS
  #define CONFIG_CMD_PART
  
  /* Device tree support */
  #define CONFIG_OF_BOARD_SETUP
  /* ATAGs support for bootm/bootz */
  #define CONFIG_SETUP_MEMORY_TAGS
  #define CONFIG_CMDLINE_TAG
  #define CONFIG_INITRD_TAG
  
  #include <config_distro_defaults.h>
  
  /* Some things don't make sense on this HW or yet */
  #undef CONFIG_CMD_FPGA
  
  /* Environment */
  #define ENV_DEVICE_SETTINGS \
  	"stdin=serial,lcd\0" \
  	"stdout=serial,lcd\0" \
  	"stderr=serial,lcd\0"
  
  /*
   * Memory layout for where various images get loaded by boot scripts:
   *
   * scriptaddr can be pretty much anywhere that doesn't conflict with something
   *   else. Put it low in memory to avoid conflicts.
   *
   * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
   *   something else. Put it low in memory to avoid conflicts.
   *
   * kernel_addr_r must be within the first 128M of RAM in order for the
   *   kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
   *   decompress itself to 0x8000 after the start of RAM, kernel_addr_r
   *   should not overlap that area, or the kernel will have to copy itself
   *   somewhere else before decompression. Similarly, the address of any other
   *   data passed to the kernel shouldn't overlap the start of RAM. Pushing
   *   this up to 16M allows for a sizable kernel to be decompressed below the
   *   compressed load address.
   *
   * fdt_addr_r simply shouldn't overlap anything else. Choosing 32M allows for
   *   the compressed kernel to be up to 16M too.
   *
   * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
   *   for the FDT/DTB to be up to 1M, which is hopefully plenty.
   */
  #define ENV_MEM_LAYOUT_SETTINGS \
  	"scriptaddr=0x00000000\0" \
  	"pxefile_addr_r=0x00100000\0" \
  	"kernel_addr_r=0x01000000\0" \
  	"fdt_addr_r=0x02000000\0" \
  	"ramdisk_addr_r=0x02100000\0" \
  
  #define BOOT_TARGET_DEVICES(func) \
  	func(MMC, mmc, 0) \
  	func(USB, usb, 0) \
  	func(PXE, pxe, na) \
  	func(DHCP, dhcp, na)
  #include <config_distro_bootcmd.h>
  
  #define CONFIG_EXTRA_ENV_SETTINGS \
  	ENV_DEVICE_SETTINGS \
  	ENV_MEM_LAYOUT_SETTINGS \
  	BOOTENV
  
  #define CONFIG_BOOTDELAY 2
  
  #endif